原创 LeetCode 819. Most Common Word
題目： Given a paragraph and a list of banned words, return the most frequent word that is not in the list of banned words
2020-07-02 09:17:34
1
原创 亞麻OA2 Substrings of size K with K distinct chars
題目： Given a string s and an int k, return all unique substrings of s of size k with k distinct characters. Example 1:
2020-07-02 07:45:46
原创 LeetCode 170. Two Sum III - Data structure design
題目： Design and implement a TwoSum class. It should support the following operations: add and find. add - Add the number
2020-07-02 07:45:35
2
原创 LeetCode 1099. Two Sum Less Than K
題目： Given an array A of integers and integer K, return the maximum S such that there exists i < j with A[i] + A[j] = S
2020-07-02 07:45:35
原创 LeetCode 937. Reorder Data in Log Files
題目： You have an array of logs. Each log is a space delimited string of words. For each log, the first word in each log
2020-07-02 07:45:34
5
原创 LeetCode 701. Insert into a Binary Search Tree
題目： Given the root node of a binary search tree (BST) and a value to be inserted into the tree, insert the value into t
2020-04-30 21:05:08
原创 Java Collections中各種數據結構的使用總結
學了683以後才感覺真正體會到了Java中數據結構的選擇的奧祕，加上最近ds的project在design的過程中也要精心挑選數據結構，所以就在實踐中學習了。但感覺每次都用完就忘，所以還是來總結一下吧。 零、Vector class（ht
2020-04-15 21:00:15
原创 LeetCode 259. 3Sum Smaller
題目： Given an array of n integers nums and a target, find the number of index triplets i, j, k with 0 <= i < j < k < n t
2020-03-24 04:53:58
1
原创 LeetCode 16. 3Sum Closest
題目： Given an array nums of n integers and an integer target, find three integers in nums such that the sum is closest t
2020-03-24 04:53:58
原创 LeetCode 23. Merge k Sorted Lists
題目： Merge k sorted linked lists and return it as one sorted list. Analyze and describe its complexity. Example: Input:
2020-02-21 11:50:45
原创 LeetCode 572. Subtree of Another Tree
題目： Given two non-empty binary trees s and t, check whether tree t has exactly the same structure and node values with
2020-02-21 11:50:45
原创 LeetCode 239. Sliding Window Maximum
題目： Given an array nums, there is a sliding window of size k which is moving from the very left of the array to the ver
2020-02-21 11:50:45
原创 LeetCode 140. Word Break II
題目： Given a non-empty string s and a dictionary wordDict containing a list of non-empty words, add spaces in s to const
2020-02-21 11:50:45
原创 LeetCode 103. Binary Tree Zigzag Level Order Traversal
題目： Given a binary tree, return the zigzag level order traversal of its nodes' values. (ie, from left to right, then ri
2020-02-21 11:50:45
原创 LeetCode 3. Longest Substring Without Repeating Characters
題目： Given a string, find the length of the longest substring without repeating characters. Example 1: Input: "abcabcbb
2020-02-21 11:50:45